Search results
Results from the WOW.Com Content Network
Phospholipase D is an important player in many physiological processes, including membrane trafficking, cytoskeletal reorganization, receptor-mediated endocytosis, exocytosis, and cell migration. [8] Through these processes, it has been further implicated in the pathophysiology of multiple diseases : in particular the progression of Parkinson's ...
Cholesterol signaling ... This effect was observed with phospholipase D. ... The cholesterol is a signal that activates cytokine production and other inflammatory ...
Common lipid signaling molecules: lysophosphatidic acid (LPA) sphingosine-1-phosphate (S1P) platelet activating factor (PAF) anandamide or arachidonoyl ethanolamine (AEA). Lipid signaling, broadly defined, refers to any biological cell signaling event involving a lipid messenger that binds a protein target, such as a receptor, kinase or phosphatase, which in turn mediate the effects of these ...
Phospholipase cleavage sites. An enzyme that displays both PLA 1 and PLA 2 activities is called a phospholipase B. A phospholipase is an enzyme that hydrolyzes phospholipids [1] into fatty acids and other lipophilic substances. There are four major classes, termed A, B, C, and D, which are distinguished by the type of reaction which they catalyze:
Phospholipase D2 is a well-defined example of an enzyme activated by substrate presentation. [27] The enzyme is palmitoylated causing the enzyme to traffic to cholesterol dependent lipid domains sometimes called "lipid rafts". The substrate of phospholipase D is phosphatidylcholine (PC) which is unsaturated and is of low abundance in lipid rafts.
By phospholipase D (PLD), via the hydrolysis of the P-O bond of phosphatidylcholine (PC) to produce PA and choline. [4] By the phosphorylation of diacylglycerol (DAG) by DAG kinase (DAGK). By the acylation of lysophosphatidic acid by lysoPA-acyltransferase (LPAAT); this is the most common pathway. [5]
Phosphatidylinositol-glycan-specific phospholipase D is an enzyme that in humans is encoded by the GPLD1 gene. [ 5 ] [ 6 ] Many proteins are tethered to the extracellular face of eukaryotic plasma membranes by a glycosylphosphatidylinositol (GPI) anchor.
Regulation of raft function by cholesterol effectively regulates substrate presentation and the many palmitoylated proteins that utilize substrate presentation as a mechanism of activation. While speculative, the profound effect of cholesterol and PUFAs on human health is likely through physiological regulation of lipid raft function in cells.